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' UNITED STATES PATENT OrricE.

LOUIS TIIIELE, vOF INDIANAPOLIS,

TIIIELE, OF SAME PLACE.

INDIANA, ASSIGNOR T0 STUMPF d:

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 550,335, dated November 26, 1895.

Application filed March 7, 1895. Serial No. 540,819. (No model.)

To all whom it may concern:-

Be it known that l, LoUIs C. THIELE, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and use-- ful Improvements in Gas-Burners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My said invention consists in various improvements in the construction and arrangement of parts of gas-burners of that class designed to burn both gas and coal either at the same time or independently, as will be hereinafter fully described and claimed.

Referring now to the drawings, in which similar letters of reference refer to like parts throughout the several views, Figure 1 is a view in perspective and partly in section of a hot-air furnace with fire-brick lining provided with gas-burners of my improved construction. This is a stationary brick-set furnace of well-known form. Fig. '2 is a transverse section on the dotted line 2 2 in Fig. 1, which is on the line where the pipes enter the brick wall. Fig. 3 is a detail in perspective, showing one of the sections of the burner detached; and Fig. 4 is a longitudinal section of a furnace having a cast-iron fire-pot instead of the sheet-metal construction lined with fire-brick shown in Fig, 1. I

A represents the'fire-pot of the furnace, and B the ash-box.

B is a horizontal table between the fire-pot and the ash-box. The table B is provided with a large central opening, within which the grate-bars O, of any usual construction suitable for burning coal, are located. The firepot is constructed of the sheet-metal retaining-wall A and the fire-brick lining A Ordinarily the fire-brick are made to rest upon the table B, and are supported by said table; but in my improved construction in order to find room for the gas-burners without displacing the grate-bars or covering them up I ele-, vate the fire-brick above the table B a suitable distance and insert my improved gasburner between the fire-brick and the table, allowing the burner to rest upon the table andthe fire-brick to rest upon the burners.

- zontal.

greater convenience in manufacture and in fitting into place, and also to facilitate the regulation and control of the fire by operating one or all of the sections, as may be desired. The drawings represent the burner as made in three sections. The upper and lower plates of the burner are preferably parallel and hori- The upper plate 0 is less in width than the thickness of the fire-brick in order that the brick will project beyond the top of the burner and act as a shield to prevent the coal and ashes from crowding onto the burner. The lower plate 0 will be considerably wider than the plate 0, preferably equal to the width of the table B, in order that no horizontal surface be allowed to remain exposed to catch ashes, &c. The outer wall 0 will-be cast integral with the top plate 0 and will.

stand at right angles to the plate C-that is, vertically-so as to allow the burner to be fitted close against the fire-pot wall A. The front wall 0 of the burner will also be integral with the top plate C and will slope from the plateJO to the plate 0 terminating opposite the inner edge of said plate." Inside lugs will be east along the lower edges of the plates C and C and threaded openings formed therein to engage screws, which will be projected through suitable openingsin the plate 0 and whereby the plate 0 will be fastened to the balance of the burner. Openings cl, through the inside wall 0 next to the plate 0, will be made for the escape of the gas into the fire-pot.

D are vertical guards cast integral with the plate C and placed at frequent intervals along said plate and projecting into the firepot. As shown, said guards are wide at their top and narrow at their, lower ends, their inner edges being Vertical and substantially in line with the inner surface of the fire-pot, forming" practicallyv a continuation of said inner surface down over the burner. The purpose of these guards is to hold the coal and cinders back from the face of the burner as they slide down vonto the grate-bars and thus assist the overhanging fire-brick in keeping the outlet from the burners into the firebox-open.

E represents the pipe through which the gas is to be supplied to the furnace: but before connecting with the burners the pipe is separated into as many branchesas there are separate sections of the burner, and a section of the burner will be connected with each branch of the pipe. There being three sections tothe burner shown in the drawings, 1

the pipe E is therefore divided into the branches e, e, and 6 each of which is provided with a valve f, bywhich the supply of gas through any one of the branches can be controlled independently of that through any.

walls 0 will be made extra thick to hold the threads necessary to make a good joint. For greater convenience a number of reinforced places will be provided in' each section in order that the connection may be made without carrying the pipes further around.

In the modification shown in Fig. '4 the firepot, instead of consisting of a thin outer wall lined with fire-brick, as shown in Fig. 1, consists of a single wall of cast metal, and the burner is formed with a recess at its inner top edge to receive and support the lower end thereof. This may be the fire-pot of a furnace or of a stove and may be varied in size and shape to suit the special design or reterfere in any way with the free use of the grate-bars. The gas is introduced at the bottom of the fire-pot, and where coal and gas are burned at the same time the .gas will greatly assist in igniting and in keeping up the combustion of the coal. The openings from the burners into the fire-pot are guarded so the cinders and coal cannot crowd-up0n and close them, and the force of the escaping gas issuing through the openings has been found amply suflicient to blow the finer ashes out of the way. I

Having thus fully described my invention, what I claim as new, andwish to secure by Letters Patent, isfi In a stove or furnace, the combination, of a gas-burner formed to be set into the wall of the fire-pot thereof, the same being'mounted on a table or ledge provided therefor under a portion of the lining or inner wall of said firepot, said lining or inner wall mounted on the top of said burner and overhanging its front face wherein are formed the openings for the escape of the gas, vertical guards projecting out from the face of said burner at frequent intervals, the tops of which are of sufficient width to extend out substantially in line with i the inner surface of the fire-pot, their inner edges being vertical and practically an extension of said inner surface of the fire-pot, whereby they assist the overhanging portion thereof in guiding the coal and cinders down and holding them beyond and free from the gas escape openings, the grate and the gas supply pipes connected with the gas-burner, substantially as set forth,

In testimonywhereof I-aflix my signature in presence of two witnesses.

LOUIS C. THIELE.

Witnesses:

JOSEPH 'A. MINTURN, F. WOERNER. 

